TWM532111U - Car start-up power source and its safety-protection circuit operable at ultra-low temperature - Google Patents

Description

Automobile starting power supply and safety protection circuit capable of working at ultra low temperature

The present invention relates to a technical field for starting safety of automobiles and automobiles at low temperatures, and particularly relates to a vehicle starting power source and a safety protection circuit that can work under ultra-low temperature.

With the continuous development of the automotive industry, most of the current cars are automatic. When the car itself cannot work, it can only be called rescue. This process takes a long time to wait, and sometimes it costs a lot of money. In order to solve these problems, many mobile power companies have introduced a car starter that can ignite the car. These power supplies are very convenient to carry, and are also accompanied by other functions such as charging the mobile phone, charging the notebook, charging the camera, etc., and have been widely loved by everyone. As we all know, there are two reasons why a car can't catch fire: 1. The original battery of the car has no electricity; 2. The original battery of the car has electricity, but the temperature is too low, the original battery of the car can't work; for the first problem, everyone will generally Change the battery regularly. For the second question, there is currently no good way to deal with it.

This patent is to solve these two problems and solve the problem, and found a suitable way to solve the problem. At present, the car starting power supply generally uses a high-rate lithium particle polymer battery, and the effective working temperature of the battery is -10 ° C ^~ 60 ° C, that is, in the environment below -10 ° C, the car starting power itself can not work (After effective treatment, some manufacturers' batteries can achieve -20 ° C). However, in actual use, the temperature will often appear when the temperature is lower than -10 °C. In order to solve this problem, many manufacturers are focusing on solving the technical problem of the use temperature of the high-rate lithium-particle polymer battery itself, which is difficult to solve, and is limited by the characteristics of the battery itself.

This patent has another bridge, using a high-stability heating technology to create a suitable battery use environment, thus effectively solving the problem of ultra-low temperature -40 ° C, the battery can not work. In addition, because of the need to burn a car, it requires a high current. 200A, such a high current will produce a lot of side reactions. For example, in the process of repeated use, the electronic components will be burned out, so that the clip for igniting the car is damaged, and the ignition function cannot be realized, and the original battery of the car is reversely charged to the mobile power source, causing the mobile power source to be ignited, for example. , expansion and so on. In order to solve this problem, many manufacturers changed the main electronic components of the car ignition clip from two to four, and changed it to six; some manufacturers added fuses to increase this safety on the original basis; None of these can fundamentally solve the problem of safe use of the vehicle's starting power supply.

The present invention relates to a technical field for starting safety of automobiles and automobiles at low temperatures, and particularly relates to a vehicle starting power source and a safety protection circuit capable of operating at an ultra-low temperature, and is highly practical.

In order to achieve the above objectives, the present invention creates a vehicle starting power supply and a safety protection circuit capable of operating at an ultra-low temperature, mainly including: an MCU single chip microcomputer, a starting power source, a power supply heating circuit for controlling a heating state of the power source, a positive output terminal, a negative output terminal, and After the external level is pulled low, the MOS transistor control circuit is turned off; the positive poles of the starting power supply are respectively connected to the positive output terminal and the power heating circuit, and one end of the MOS transistor control circuit is connected to the negative output terminal, and the other end is connected with Starting the negative connection of the power supply, the MCU The two pins on the single chip are respectively connected with the positive output terminal and the negative output terminal, and the other two pins are also connected to the two ends of the MOS transistor control circuit, and the MCU microcontroller also leads to the three pins and the power supply. Heating circuit connection.

The power heating circuit includes a button for issuing a heating command to the MCU, a thermistor for sensing an ambient temperature, an amplifying MOS tube, and a heating wire for supplying heat to the power source; the MCU is respectively connected with a button, a thermistor, and The gate of the amplifying MOS transistor is electrically connected, and one end of the heating wire is electrically connected to the drain of the amplifying MOS transistor, and the other end is electrically connected to the starting power source.

One end of the button is electrically connected to the MCU single chip, and the other end is grounded to discharge static electricity; one end of the thermistor is electrically connected to the MCU single chip, and the other end is grounded to discharge static electricity; the source of the amplifying MOS tube is grounded.

The MOS transistor control circuit includes a first MOS transistor, a second MOS transistor, a third MOS transistor, a fourth MOS transistor, a fifth MOS transistor, and a sixth MOS transistor, and the first MOS transistor and the second MOS transistor And the source of the third MOS transistor is respectively connected to the output end of the negative electrode, and the gate is respectively connected to the MCU single chip; the sources of the fourth MOS transistor, the fifth MOS transistor and the sixth MOS transistor are respectively connected to the power source. And the gates are respectively connected to the MCU single chip; the drains of the first MOS transistor, the second MOS transistor and the third MOS transistor are connected to each other, and the drains of the fourth MOS transistor, the fifth MOS transistor and the sixth MOS transistor Connected to each other.

The first MOS transistor, the second MOS transistor, the third MOS transistor, the fourth MOS transistor, the fifth MOS transistor, and the sixth MOS transistor are all N-shaped MOS transistors.

The beneficial effects of this creation are:

Compared with the prior art, the present invention can operate a vehicle starting power supply and its safety protection circuit at an ultra-low temperature, with an independent power supply heating circuit, which can quickly and safely heat the battery of the vehicle starting power source in a low temperature environment; The battery temperature of the car starting power supply reaches a reasonable working temperature, thus solving the low The problem of using the car to start the power supply. At the same time, when a short circuit occurs in the circuit, the MCU microcontroller receives a voltage value that exceeds the preset value. The MCU microcontroller and the MOS transistor control circuit pin are quickly pulled low to become a low level, and the MOS transistor control circuit enters a closed state to protect the positive output terminal. Electronic components between the output terminal and the negative terminal. The MCU in this creation controls the MOS tube to open and close to realize protection. By detecting whether the current flowing through the MOS tube is abnormal and the temperature is abnormal, the MOS tube is controlled to be turned on and off. The advantage of this circuit is that the circuit will immediately close when short circuited. The output is broken, the circuit that protects the startup power supply and the clip is not damaged, thus effectively solving the safety problem of starting the power supply.

1‧‧‧MOS tube control circuit

2‧‧‧Power heating circuit

B‧‧‧Starting the power supply

OUT+‧‧‧ positive output

OUT-‧‧‧Negative output

MCU‧‧‧MCU

R1‧‧‧Thermistor

K‧‧‧ button

R2‧‧‧ heating wire

Q0‧‧‧Amplify MOS tube

Q1‧‧‧First MOS tube

Q2‧‧‧Second MOS tube

Q3‧‧‧ Third MOS tube

Q4‧‧‧fourth MOS tube

Q5‧‧‧ fifth MOS tube

Q6‧‧‧ sixth MOS tube

Figure 1 is a schematic diagram of the circuit of this creation.

The composition and other features of the present invention will become apparent after reading the following detailed description of embodiments with reference to the accompanying drawings.

As shown in Figure 1, the creation of a car starting power supply and its safety protection circuit under ultra-low temperature, mainly includes: positive output terminal OUT+, negative output terminal OUT-, MCU microcontroller, start power supply B, control power supply heating The power supply heating circuit 2 of the state and the MOS transistor control circuit 1 that enters the off state after the external level is pulled low; the positive poles of the startup power source B are respectively connected to the positive output terminal OUT+ and the power supply heating circuit 2, and the MOS transistor control circuit 1 has one end and a negative pole. The output terminal OUT- is connected, and the other end is connected with the negative pole of the starting power source B. The two pins on the MCU MCU are respectively connected with the positive output terminal OUT+ and the negative output terminal OUT-, and the MCU microcontroller also leads to the other two pins respectively and the MOS. The tube control circuit 1 is connected at both ends, and the MCU microcontroller also leads to the three-pin position connected to the power heating circuit 2.

Compared with the prior art, the present invention can operate a car starting power supply and its safety protection circuit at an ultra-low temperature, with an independent power supply heating circuit 2, and in a low temperature environment, the battery of the power source B is quickly and safely supplied to the vehicle. Heating; the battery temperature of the vehicle starting power source B reaches a reasonable working temperature, thereby solving the problem of using the vehicle starting power source B at a low temperature. At the same time, when the circuit is short-circuited, the MCU microcontroller receives a voltage value that exceeds the preset value. The MCU microcontroller and the MOS transistor control circuit 1 pin quickly pull low to become low level, and the MOS transistor control circuit 1 enters the off state to protect the positive output terminal. Electronic components between OUT+ and the negative output OUT-. The MCU in this creation controls the MOS tube to open and close to realize protection. By detecting whether the current flowing through the MOS tube is abnormal and the temperature is abnormal, the MOS tube is controlled to be turned on and off. The advantage of this circuit is that the circuit will immediately close when short circuited. The output is broken, and the circuit on the protection power source B and the clip is protected from damage, thereby effectively solving the safety problem of starting the power source B.

Wherein, the power heating circuit 2 includes a button K for issuing a heating command to the MCU microcontroller, a thermistor R1 for sensing the ambient temperature, an amplifying MOS tube Q0, and a heating wire R2 for supplying heat to the power source; the MCU microcontroller is respectively associated with the button K and the thermal The resistor R1 and the gate of the amplifying MOS transistor Q0 are electrically connected, one end of the heating wire R2 is electrically connected to the drain of the amplifying MOS transistor Q0, and the other end is electrically connected to the starting power source B. When the temperature of the starting power source B is insufficient, press the button K to control the heating of the heating wire R2, thereby increasing the temperature of the power source in time. This creation uses an external heating method to add an independent low temperature button based on the use of the existing vehicle start power supply B. The low temperature button controls an independent circuit to quickly and safely start the car in a low temperature environment. The battery of power source B is heated.

One end of the button K is electrically connected with the MCU single chip, and the other end is grounded to discharge static electricity; one end of the thermistor R1 is electrically connected with the MCU single chip, and the other end is grounded to discharge static electricity; the source of the MOS tube Q0 is grounded.

The MOS transistor control circuit 1 includes a first MOS transistor Q1, a second MOS transistor Q2, a third MOS transistor Q3, a fourth MOS transistor Q4, a fifth MOS transistor Q5, and a sixth MOS transistor Q6, and the first MOS transistor Q1. Second MOS The sources of the tube Q2 and the third MOS transistor Q3 are respectively connected to the negative output terminal OUT-, and the gates are respectively connected with the MCU single chip; the sources of the fourth MOS transistor Q4, the fifth MOS transistor Q5 and the sixth MOS transistor Q6 Connected to the power supply respectively, and the gates are respectively connected with the MCU single chip; the drains of the first MOS transistor Q1, the second MOS transistor Q2 and the third MOS transistor Q3 are connected to each other, and the fourth MOS transistor Q4 and the fifth MOS transistor are connected to each other. Q5 and the drains of the sixth MOS transistor Q6 are connected to each other.

The first MOS transistor Q1, the second MOS transistor Q2, the third MOS transistor Q3, the fourth MOS transistor Q4, the fifth MOS transistor Q5, and the sixth MOS transistor Q6 are all N-shaped MOS transistors. In summary, the creation structure is novel and practical, and its function is far superior to the progressive and industrial use value of the formula. It is in line with the patent application requirements and proposes a new type of patent application according to law.

The specific embodiments described above are intended to clarify the purpose, features and effects of the present invention. For those skilled in the art, it is possible to make partial changes and modifications to the specific embodiments based on the above description. Anyone who has left the spirit of this creation should be included in the scope of the patent application in this case.

1‧‧‧MOS tube control circuit

2‧‧‧Power heating circuit

B‧‧‧Starting the power supply

OUT+‧‧‧ positive output

OUT-‧‧‧Negative output

MCU‧‧‧MCU

R1‧‧‧Thermistor

K‧‧‧ button

R2‧‧‧ heating wire

Q0‧‧‧Amplify MOS tube

Q1‧‧‧First MOS tube

Q2‧‧‧Second MOS tube

Q3‧‧‧ Third MOS tube

Q4‧‧‧fourth MOS tube

Q5‧‧‧ fifth MOS tube

Q6‧‧‧ sixth MOS tube

Claims (5)

A vehicle starting power supply and a safety protection circuit capable of operating at an ultra-low temperature, characterized by having a reasonable ultra-low temperature circuit capable of safely starting a car and having a safety protection circuit, including an MCU single chip microcomputer, a starting power source, and a control power source heating a state power supply heating circuit, a positive output terminal, a negative output terminal, and a MOS transistor control circuit that enters a closed state after the external level is pulled low; the positive poles of the startup power supply are respectively connected to the positive output terminal and the power supply heating circuit, the MOS One end of the tube control circuit is connected to the negative output terminal, and the other end is connected to the negative pole of the starting power supply. The two pins of the MCU single chip are respectively connected with the positive output terminal and the negative output terminal, and the other two legs of the MCU microcontroller are also led out. The bits are respectively connected to both ends of the MOS tube control circuit, and the MCU microcontroller also leads to a three-pin position connected to the power heating circuit. The vehicle starting power supply and the safety protection circuit thereof capable of working at an ultra-low temperature as described in claim 1 are characterized in that: the power supply heating circuit includes a button for issuing a heating command to the MCU microcontroller, and sensing the heat of the ambient temperature. a varistor, an amplifying MOS tube and a heating wire for supplying heat to the power source; the MCU single chip is electrically connected to a button, a thermistor and a gate of the amplifying MOS tube, and one end of the heating wire is electrically connected to the drain of the amplifying MOS tube And the other end is electrically connected to the startup power source. The vehicle starting power supply and the safety protection circuit thereof can be operated at an ultra-low temperature as described in claim 2, wherein one end of the button is electrically connected to the MCU single chip, and the other end is grounded to discharge static electricity; the thermistor One end is electrically connected to the MCU single chip, and the other end is grounded to discharge static electricity; the source of the amplifying MOS tube is grounded. The vehicle starting power source and the safety protection circuit thereof capable of working at an ultra-low temperature as described in claim 1 are characterized in that: the MOS tube control circuit comprises a first MOS tube, a second MOS tube, and a third MOS tube. a fourth MOS transistor, a fifth MOS transistor, and a sixth MOS transistor, wherein the sources of the first MOS transistor, the second MOS transistor, and the third MOS transistor are respectively connected to the negative output terminal, and the gates are respectively connected to the MCU microcontroller Connecting, the sources of the fourth MOS transistor, the fifth MOS transistor, and the sixth MOS transistor are respectively connected to the power source, and the gates are respectively connected to the MCU single chip; the first MOS transistor, the second MOS transistor, and the third The drains of the MOS transistors are connected to each other, and the drains of the fourth MOS transistor, the fifth MOS transistor, and the sixth MOS transistor are connected to each other. The vehicle starting power source and the safety protection circuit thereof capable of working at an ultra-low temperature as described in claim 4, wherein the first MOS transistor, the second MOS transistor, the third MOS transistor, and the fourth MOS transistor The fifth MOS transistor and the sixth MOS transistor are all N-shaped MOS transistors.